The thrill that you get from achieving that goal, whether flying a plane, running a race, or shagging a sheep, diminishes every time you repeat the feat. The Piper Cub pilot might aspire to a Learjet, the 5K runner might take on a marathon, and sheep shagger wait stop why would anybody do that?!
You take the first leap of faith, and want to experience the same thrill, so you take it to greater heights.
After you've once again reached that plateau, you take it to the extreme.
The Moscow based Sinner Team has been practicing extreme stunts since 2008. Despite the extreme nature of their sports, they play it safe. Here a group member makes sure the bungee doesn't tangle as a colleague takes a 250 foot leap from the tower.
It's immediately noticeable when the end of the bungee is reached and it starts to stretch.
But there's no need to worry, when the harness is firmly attached to the body.
The Sinners prepare for their jumps by inserting four metal bars to which the harness will attach through skin piercings. The piercings are temporary, just for the occasion.
They jump and record their expressions as the harness tightens.
Then they land triumphantly. We wonder what they'll hang from when the thrill is over this time.

Even as a young boy, Ethan (not his real name)wasn't confident around girls.
As he grew older, his shyness around girls never diminished.
At the age of 17, he became tired of his handicap. Unable to play any competitive sports, have sex or even wear pants without difficulty, it became time to face his problem.
The teen decided to have his penis reduced.
The 17-year-old's flaccid instrument measured seven inches in length but had a circumference of 10 inches - which is about the size of a grapefruit.
Before the life-changing operation, surgeons said it was shaped like a "rugby ball" and restricted his ability to play sports or have sex.
The teen told doctors he would spontaneously get erections because the shape of it restricted the natural blood flow.
Rafael Carrion, a urologist at the University of South Florida took on the challenge. Surgeons developed a new technique normally used to cut scar tissue from the penis by slicing alongside an old circumcision scar and cut out two segments of tissue from either side.
Dr Carrion said, "It was a bit like having two side tummy-tucks - that's how we explained it to him."
In the end it was complete success and the teen is ecstatic with the results. Dr Carrion reported, "It looks cosmetically appealing, and he said it was a life-changing event, he's all smiles."

Ex Vice-President Dick "Dick" Cheney started the trend.
While on a hunting trip, he shot 78 year old Harry Whittington, a Bush-Cheney campaign donor from Austin, Texas. #shootafriendintheface
Whittington had a heart attack after a piece of buckshot migrated to a heart muscle, but most of the other wounds were superficial. A grateful Whittington later appeared on television to apologize for the incident.

Medical drawing of injuries to Harry Whittington

"My family and I are deeply sorry for all that Vice President Cheney and his family have had to go through this week," Whittington said.
But it was too late to prevent the new fad of shooting a friend in the face. #shootafriendintheface
Six year old Yang Yang was playing with his cousin in Neijiang, in southwest China's Sichuan Province, when thy came across a gun. Yang's cousin, also six years old, picked it up and shot him in the face.
The boys returned to their house about ten minutes later, according to their grandmother, who said, “They were crying, and Yang Yang's face had a huge hole, bleeding profusely.”
Doctors removed all 325 pellets from the blast.
Yang's father said that both boys were terrified at what had happened. Like Whittington, Yang is expected to survive, though there will be substantial scarring.
But he's lucky. Shotgun wounds to the face can be much more serious.
And apologizing to Dick Cheney won't make it any better.